Lamp-lock.



-1. SACHS.

LAMP LOCK. APPLIQATION FILED FEB. 24p19l3.

Patented Feb.2 7,1917

- enses.

JOSEPH sACHs, or HART DQCONNECTIC T, AssICNO BY MEsNE ASSIGNMENTS,

To THE HART & HEGEMAN MANUFACTURING COMPANY, OF HARTFORD, CO NEC- ,'TICUT, A CORPORATION OF CONNECTICUT. I

LAMP-LOCK.

Specification of Letters Patent; Patented Feb 2'7, 191,?

Application filed February 24, 1913. Serial No. 750,136.

To all whom/it mag concern: Be it known that I, Josnrn SACHS, citizen ofthe United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Lamp-Locks, of which the following is a specification.

This invention relates to lamp-locks Or that class of devices which are provided to prevent the surreptitious withdrawal of an incandescent lamp from its socket, among the principal objects of the invention being the provision of an article of, this character which is simple in construction, capable of easy and inexpensive manufacture and which when in operative relation will effectually prevent the lamp from being- .taken from the socket, unless the lock be destroyed, for instance by the use of acut- .20

ting tool or some like implement. It is a well known fact that thieves abstract incandescent lamps from their sockets especially when the sameuarel'expensive such as those knownas tungsten lamps. I provide a lock in the form of a band which preferably encircles both the lamp and its socket and which is preferably in one piece being ordinarily but not ne eessarily',-; endless or continuous and adapted in some suitable manner to interlock with at least either the'lamp or socket but preferably with both, and, which is applied after the lamp has been inserted in said socket so that before A the lamp can be taken from place, it will 'be necessary to cut through said band, which is'an operation usually requiring some time and the aid of a tool which thieves do not generally .carry. In addition to thisthe possibility of a thief being detected in the act of cutting through one Ofthe bands, an,

operation which, as already observed requires soine time, will ordinarily deter him from committing the theft.

In the drawings accompanying and forming part of the present specification I have shown in detaih'severalof the many advantageous forms OLembOdiment of the invention which to enable those skilled in the art to practice the same, will be fully set forth in the following description. I do not restrict myself to this showing; I may depart Y therefrom in many respects within the scope of my claims following said description.

Referring to said drzuvings:

Figure 1 is a. view of portion of a lamp and its socket in assembled relation, a portion of the socket and a. part'pf a catch member on the lamp being'broken away,

the view also showing the locking band in vertical section;

' Fig.vv 2is a view-Of similar parts, the

socket, lamp and catch member being in -elevationand the locking band in. section,

2 but showing the locking band of Fig. 3

applied and set or contracted in'working relation.

Fig. 5 shows the locking band of Figs. 3

and 4 in operative position, the lamp and socket also partly appearing.

Figs. 6 and 7 are respectively a top plan view and vertical section of another form of locking bandshowingthe same in uncontracted condition. I

Fig. 8 is a top plan View of the' band shown in the two preceding views in contracted relation. Fig. 9 is a top plan view of another form. of band in uncontracted relation.

Fig. 10 is a view corresponding with Fig. 4 of another form of lock. Like characters refer to like parts throughout the several figures. I

' My inventlon as 'to one of its broader asbe snippedthrough. Such a band can vary radically as to character and as already stated I have illustrated several of the many forms which said. band, can take; there are others within the spiritof my invention.v

Said band may be interlocked both with the lamp and socket and there may be cases where the band will prevent withdrawal of the lamp from the socket merely by the insome suitable metal as brass.

terlocking grip of the band with one or both of the parts. I can secure said interlocked relation in various ways, for instance and as will hereinafter appear, by distorting or bending portions of the. band or ring into engagement with catch portions on either the lamp or socket or both.

Referring first to Fig. 1 which illustrates partly a lamp 2 and its socket 3 both of standard construction, the annular head 1 on said socket answers suitably as a catch portion for engagement by a part on the locking band 5 which is usually made from The catch member on the la1np.2 may vary, although the ring 6 meets the necessities, and is preferably but not essentially of some insulating material, as fiber, to insulate the lamp-base from the locking-band 5, said catch-ring'G surrounding the neck of the lamp and its inner edge being beveled or acute to engage .over the upper edge of the metal shell of said base.

. Initially the inner diameter of the locking band 5 is greater than the diameters of the bead 1 and catch ring 6 in fact at this time said ring is practically a true cylinder so that said locking band can be freely passed over the socket 3 and so that the lamp can be inserted in the socket while the band is thereon. The said locking-band will then be positioned 'to bring its lower edge below the bead 4 and its upper edge above the catch ring 6 in which position said lockingband 5 is in readiness to be set which is accomplished by distortingthe same, for instance by curling, spinning, crimping or bending the lower portion of said ring over said bead as at 7 and by distorting said band near its upper edge inwardly in such manner as to produce within the same, an annular bead 8 which engages over the upper side of the catch ring 6 so that when the parts are in this relation the lamp cannot be unscrewed from its socket.

Referring now to Fig. 2, the lamp therein shown is denoted by 9, its socket by 10, the split or divided catch ring by 11 and the catch bead by 12, these parts being the same as those already described. The locking band is denoted by 13 and is originally like and is applied similarly to the band 5. After being positioned, the band 13 has punched therefrom the interior spurs or projections 14; which engage against the catch portions 11 and 12 of the lamp and its socket respectively.

Referring now to Figs. 3, 4, and 5, the lamp, socket, lamp catch portion and socket catch portion are denoted by 15, 16, 17 and 18 respectively, the locking-band being denoted by 19 and being initially cylindrical as shown best in Fig. 4 but being distortible into interlocked relation with the catch-portions of the lamp and socket respectively.

The said locking band 19 is provided with interior catch portions such as the annular flanges 20 and 21 cooperating respectively tortion of said band 19 the opposite edges of the-same may be notched as at 22 and the body thereof also have a vertically'elongated slot 23. This band 19 is practically applied like the other bands already described and when the two flanges 20 and 21 are in correct positions said band will be compressed or constricted, thus distorting or flexing the same as to move and set the flanges 20 and 21 along or opposite the outer surfaces of the two catch portions 17 v and 18, said band being shown in Fig. 5 in its compressed condition. The ring 17 is of metal and is also preferaby split, the band 19 having an interior lining 19 of insulating material to thus insulate said band from the base of the lamp.

the locking band therein represented is de noted by 24 and it is approximately originally cylindrical. I say approximately as said band 24 is not an exact cylinder in the strict sense of the term as it has peripherally several integral channel-like extensions or bowed lugs 25. Said band 2 1 has inner flanges 26 and 27 duplicates in function of the flanges 20 and 21. The flanges 26 and 27 are, however, not continuous or unbroken, being cut through i or interrupted at the bowed lugs 25. This band 241 is applied like the other bands, and when in position to have its flanges 26 and 27 properly placed with respect to the catch portions of the lamp and socket, respectively, will be constricted or contracted about said parts, which action collapses the hollow lugs or cars 25 and also brings the ends of the segments or sections of the flanges 26 and 27 into abutment or practically so as shown in Fig. 8, i

In Fig. 9 the locking band 28 is like the band 24c except that instead of having a plurality of the collapsible lugs or ears, it has only one, denoted by 29.

In Fig. 10 the locking band 30 engages with only one of the parts. (the socket 31 as shown) to interlock the same, the lower portion of the shell of said socketbeing expansible and contractible for example by forming several slits 32 therein. The upper end of said shell of said socket is interiorly flanged as at 33 to engage the catch ring 34: on the lamp 35, the upper portion of said shell thereby presenting a latching part. This latching part is maintained in operative relation by the locking band 30 which Referring now to Figs. 6 to 8 inclusive has one or more tongues 36, adapted to be projected by distortion, or otherwise, through slots or openings 37 in the shell of said socket after said band 30 has been applied.

What I claim is:

' 1. A look for holding an incandescent lamp in its socket, provided with separate means for engaging the socket and the lamp, said lock also comprising'distortible means for maintaining the lock in operative relation, whereby said two engaging means can Jointly act to prevent the lamp being pulled from place when the lock is in operative relation.

2. A look for holding an incandescent I. lamp in its socket comprising a locking band lamp in its socket comprising a locking band having a distortible lamp locking portion, and a split insulating ring held within the band, the two being disconnected to permit the ring to be applied to the lamp independently of the band, the ring when in operative position encircling the neck of a lamp and engaging under the base shell thereof.

4. A look for holding an incandescent lamp in its socket comprising a locking band having an inwardly distortible portion and i also having means to engage the external bead of the socket, and a split insulating ring supported by said distortible portion in the band, the band andring being disconnected to permit the ring to be applied to the lamp independently of the band, the ring when in position encircling the neck of the lamp and engaging under the base shell I thereof.

In testimony whereof I aflix my signature in presence of two witnesses.

. JOSEPH SACHS.

W'itnesses:

HEATH SUTHERLAND, JAMES H. KEANE. 

